GMC Hummer EV Pickup Service Bulletins (2025)

391 manufacturer communications on file.

• November 18, 2025•Document ID: 11025750

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6602P

  Date Added:

  November 28, 2025

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.

  Associated Products (33)

  2026 Chevrolet Silverado2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 BrightDrop Zevo2023 Chevrolet Silverado+ 13 more
  Associated Documents

  • DownloadMC-11025750-0001.pdf↗
• November 13, 2025•Document ID: 11025581

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP5981G

  Date Added:

  November 17, 2025

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review.

  Associated Products (34)

  2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Blazer2026 Chevrolet BrightDrop2026 Chevrolet Equinox2026 Chevrolet Silverado2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Sierra2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Chevrolet Blazer2025 Chevrolet BrightDrop2025 Chevrolet Equinox2025 Chevrolet Silverado2025 GMC Hummer EV Pickup+ 14 more
  Associated Documents

  • DownloadMC-11025581-0001.pdf↗
• November 13, 2025•Document ID: 11025574

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6629A

  Date Added:

  November 17, 2025

  Manufacturer:

  BUICK

  Summary

  This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

  Associated Products (93)

  2026 Buick Enclave2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Celestiq2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Blazer2026 Chevrolet Colorado2026 Chevrolet Corvette2026 Chevrolet Equinox2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 Chevrolet Trailblazer2026 Chevrolet Traverse+ 73 more
  Associated Documents

  • DownloadMC-11025574-0001.pdf↗
• November 11, 2025•Document ID: 11025575

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6602N

  Date Added:

  November 17, 2025

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.

  Associated Products (31)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 BrightDrop Zevo2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe+ 11 more
  Associated Documents

  • DownloadMC-11025575-0001.pdf↗
• November 11, 2025•Document ID: 11025572

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6629

  Date Added:

  November 17, 2025

  Manufacturer:

  GMC

  Summary

  This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

  Associated Products (93)

  2026 Buick Enclave2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Blazer2026 Chevrolet Colorado2026 Chevrolet Corvette2026 Chevrolet Equinox2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 Chevrolet Trailblazer2026 Chevrolet Traverse2026 Chevrolet Trax+ 73 more
  Associated Documents

  • DownloadMC-11025572-0001.pdf↗
• November 3, 2025•Document ID: 11025453

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6446

  Date Added:

  November 10, 2025

  Manufacturer:

  GMC

  Summary

  This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.

  Associated Products (67)

  2026 Cadillac CT42026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac CT42025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Chevrolet Silverado2025 Chevrolet Suburban2025 Chevrolet Tahoe2025 GMC Hummer EV Pickup+ 47 more
  Associated Documents

  • DownloadMC-11025453-0001.pdf↗
• October 29, 2025•Document ID: 11024768

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6446

  Date Added:

  November 3, 2025

  Manufacturer:

  CHEVROLET

  Summary

  This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.

  Associated Products (67)

  2026 Cadillac CT42026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac CT42025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Chevrolet Silverado2025 Chevrolet Suburban+ 47 more
  Associated Documents

  • DownloadMC-11024768-0001.pdf↗
• October 23, 2025•Document ID: 11024705

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6602M

  Date Added:

  November 2, 2025

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.

  Associated Products (31)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 BrightDrop Zevo2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe+ 11 more
  Associated Documents

  • DownloadMC-11024705-0001.pdf↗
• October 18, 2025•Document ID: 11024463

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6602L

  Date Added:

  October 24, 2025

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.

  Associated Products (31)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 BrightDrop Zevo2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe+ 11 more
  Associated Documents

  • DownloadMC-11024463-0001.pdf↗
• October 18, 2025•Document ID: 11024460

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6425B

  Date Added:

  October 24, 2025

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

  Associated Products (325)

  2027 Chevrolet Bolt EV2026 Buick Enclave2026 Buick Encore2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Cadillac XT42026 Cadillac XT52026 Cadillac XT62026 Chevrolet Blazer+ 305 more
  Associated Documents

  • DownloadMC-11024460-0001.pdf↗
• October 17, 2025•Document ID: 11024455

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6425A

  Date Added:

  October 24, 2025

  Manufacturer:

  BUICK

  Summary

  This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

  Associated Products (325)

  2027 Chevrolet Bolt EV2026 Buick Enclave2026 Buick Encore2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Cadillac XT42026 Cadillac XT52026 Cadillac XT62026 Chevrolet Blazer+ 305 more
  Associated Documents

  • DownloadMC-11024455-0001.pdf↗
• October 16, 2025•Document ID: 11024458

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6551A

  Date Added:

  October 24, 2025

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues

  Associated Products (193)

  2025 Buick Enclave2025 Buick Encore2025 Buick Encore GX2025 Buick Envision2025 Buick Envista2025 Cadillac Celestiq2025 Cadillac CT42025 Cadillac CT52025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Cadillac XT42025 Cadillac XT52025 Cadillac XT62025 Chevrolet Blazer2025 Chevrolet BrightDrop2025 Chevrolet Colorado2025 Chevrolet Corvette+ 173 more
  Associated Documents

  • DownloadMC-11024458-0001.pdf↗
• October 9, 2025•Document ID: 11024466

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6602K

  Date Added:

  October 24, 2025

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.

  Associated Products (30)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 BrightDrop Zevo2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe2023 GMC Hummer EV Pickup+ 10 more
  Associated Documents

  • DownloadMC-11024466-0001.pdf↗
• October 7, 2025•Document ID: 11023952

  Service Campaign
  UNKNOWN OR OTHER

  Mfr Comm. #:

  N252516700

  Date Added:

  October 7, 2025

  Manufacturer:

  GMC

  Summary

  The Battery Energy Control Module (BECM) in certain vehicles include battery-monitoring software. An update is available for this software that improves the BECM’s ability to detect moisture inside the RESS enclosure. Dealers are to reprogram the BECM with the updated software.

  Associated Products (6)

  2025 Cadillac Escalade IQ2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2024 Chevrolet Silverado2024 GMC Hummer EV Pickup
  Associated Documents

  • DownloadMC-11023952-0001.pdf↗
• October 4, 2025•Document ID: 11024439

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6440

  Date Added:

  October 24, 2025

  Manufacturer:

  CADILLAC

  Summary

  The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.

  Associated Products (278)

  2026 Buick Enclave2026 Buick Encore2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Cadillac XT42026 Cadillac XT52026 Cadillac XT62026 Chevrolet Blazer2026 Chevrolet BrightDrop+ 258 more
  Associated Documents

  • DownloadMC-11024439-0001.pdf↗
• October 3, 2025•Document ID: 11025555

  Service Bulletin/Repair Instructions
  SUSPENSION

  Mfr Comm. #:

  25-NA-152

  Date Added:

  November 15, 2025

  Manufacturer:

  GMC

  Summary

  this bulletin advises the tech not to replace the shock for possible air leak, but to replace the air valve on the shock.

  Associated Products (12)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Chevrolet Silverado2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2023 GMC Hummer EV Pickup2022 GMC Hummer EV Pickup
  Associated Documents

  • DownloadMC-11025555-0001.pdf↗
• September 30, 2025•Document ID: 11023410

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  N25-251670

  Date Added:

  October 1, 2025

  Manufacturer:

  GMC

  Summary

  • Improvements to battery health diagnostics • Fixes for efficiency when using fast charging stations • Improvements to reliability for climate control and charging • Improvements to the accuracy of efficiency values • Improvements to shifting • Fixes to protect battery health and adjust charge limits • Improvements to diagnostics that impact propulsion, charging, and One-Pedal Driving During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

  Associated Products (3)

  2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2024 GMC Hummer EV Pickup
  Associated Documents

  • DownloadMC-11023410-0001.pdf↗
• September 20, 2025•Document ID: 11023351

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6356C

  Date Added:

  September 26, 2025

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary information communicates A vehicle may be encountered with super cruise inop due to not seeing drivers face clearly. The tech is directed to inspect the Infrared LED's on the steering wheel and replace the wheel if necessary.

  Associated Products (37)

  2026 Cadillac Vistiq2025 Buick Enclave2025 Cadillac Celestiq2025 Cadillac CT52025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Cadillac XT62025 Chevrolet Blazer2025 Chevrolet Equinox2025 Chevrolet Silverado2025 Chevrolet Suburban2025 Chevrolet Tahoe2025 Chevrolet Traverse2025 GMC Acadia2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra+ 17 more
  Associated Documents

  • DownloadMC-11023351-0001.pdf↗
• September 10, 2025•Document ID: 11023158

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6424B

  Date Added:

  September 17, 2025

  Manufacturer:

  GMC

  Summary

  A vehicle may come in with B3A6B set in history. Tech is directed to clear code and advise the customer an OTA will be released for the code.

  Associated Products (26)

  2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Cadillac Vistiq2026 Chevrolet Silverado2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Sierra2025 Cadillac Celestiq2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Chevrolet Blazer2025 Chevrolet BrightDrop2025 Chevrolet Equinox2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 BrightDrop Zevo2024 Cadillac Lyriq+ 6 more
  Associated Documents

  • DownloadMC-11023158-0001.pdf↗
• September 9, 2025•Document ID: 11023157

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT5479H

  Date Added:

  September 17, 2025

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston.

  Associated Products (132)

  2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Chevrolet Colorado2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 GMC Canyon2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Chevrolet Colorado2025 Chevrolet Silverado2025 Chevrolet Suburban+ 112 more
  Associated Documents

  • DownloadMC-11023157-0001.pdf↗